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Commit 9346c2a8 authored by Jie Liu's avatar Jie Liu Committed by Konrad Rzeszutek Wilk
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xen: simplify balloon_first_page() with list_first_entry_or_null() 



Replace the code logic at balloon_first_page() by calling
list_first_entry_or_null() directly.  since here is only
one user of that routine, therefore we can just remove it.

Signed-off-by: default avatarJie Liu <jeff.liu@oracle.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
parent 02bcf053

drivers/xen/balloon.c

+1 −8
Original line number Diff line number Diff line
@@ -157,13 +157,6 @@ static struct page *balloon_retrieve(bool prefer_highmem) 
	return page;

}



static struct page *balloon_first_page(void)

{

	if (list_empty(&ballooned_pages))

		return NULL;

	return list_entry(ballooned_pages.next, struct page, lru);

}



static struct page *balloon_next_page(struct page *page)

{

	struct list_head *next = page->lru.next;
@@ -328,7 +321,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages) 
	if (nr_pages > ARRAY_SIZE(frame_list))

		nr_pages = ARRAY_SIZE(frame_list);



	page = balloon_first_page();

	page = list_first_entry_or_null(&ballooned_pages, struct page, lru);

	for (i = 0; i < nr_pages; i++) {

		if (!page) {

			nr_pages = i;